A low-cost, optical feedback laser range-finder with chirp-control

A low-cost, optical feedback laser range-finder with chirp-control

A new laser range finder using optical feedback interferometry and wavelength sweep has been developed. Our aim was to design a high-accuracy sensor for operation on short distances, using a low-cost Mach-Zender interferometer to separately measure the chirp of the laser. Experimentally, on a plain...

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Bibliographische Detailangaben
Hauptverfasser: Bosch, T., Pavageau, S., D'Alessandro, D., Servagent, N., Annovazzi-Lodi, V., Donati, S.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Chirp
Coherence
Frequency
Laser feedback
Optical feedback
Optical interferometry
Optical modulation
Optical sensors
Power lasers
Semiconductor lasers
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Beschreibung
Zusammenfassung:A new laser range finder using optical feedback interferometry and wavelength sweep has been developed. Our aim was to design a high-accuracy sensor for operation on short distances, using a low-cost Mach-Zender interferometer to separately measure the chirp of the laser. Experimentally, on a plain diffusing target, at a 10-cm distance, we were able to demonstrate an accuracy of 100 /spl mu/m. Projected accuracy is down to 20-50 /spl mu/m.
ISSN:1091-5281
DOI:10.1109/IMTC.2001.928244